UNITS OF INSTRUCTION
- SAFETY ON SITE
Details of safety measures and care required when using tools and equipment. Safe use of material with a health hazard. Safety precautions on sites in connection with trenches ladders and scaffolds.
2. PIPES AND FITTINGS
Types and grade of pipes, their identification and suitability in plumber’s work for loading and hot water supplies, water, flush and warning pipes, soil pipes, rain water and underground drainage.
3. COLD WATER SUPPLY
Layout and pipe work arrangements for domestic cold-water systems of storage and non-storage types. Simple hand pumps and their methods of operation. Principles in working of step valves, wash out values. Low and high-pressure ball valves. Pollution of supply presentation. Procedures for testing, sterilizing and commissioning completed systems.
4. HOT WATER SUPPLY
Layout and pipe work arrangement for direct and indirect systems including single feed astern. Boilers, types of water heaters and their position. Bye-laws and regulation relating to hot water supply. Thermal insulation to reduce heat loss or gain. Testing and commissioning of completed installations diagnosis and rectification of faults.
Description of domestic baths, washbasin domestic sinks, wash down and symphonic water closets and bidets. Method if jointing and fixing pipes of varies materials for sanitation work. Principles of lighting and ventilating of W.C, apartments connecting of discharge pipes to drainage systems testing of sanitary pipe work systems.
The basic principles of good drainage. Common fittings for domestic drainage systems Layout of simple, combined and separate systems of domestic drainage. Sitting of cesspools, septic tanks in relation to building. Testing of drains. Suitable material and method of fixing, laying and jointing gain pipes. Use of fitting for drainage systems including gullies and interceptors, e.g. petrol, grease and silt. Sizes and gradient of drains. Use of levelling instrument. Method of testing.
7. SOLDERING, BRAZING AND WELDING
Safety in the assembly and use of portable welding equipment. Principles of soldering, bronze welding, brazing and autogenously welding. Welding techniques including autogenously welding brazing, bronze welding and solvent welding. Characteristics of welding joints.
8. DOMESTIC GAS FITTINGS
Liquefied petroleum gas (LP.G.)
Sources of natural gas cracking
Crude oil refinery
Safety in handing of L.P.G. Cylinders
Purging of installation
Servicing of Domestic Gas cookers
Gas piping material and jointing method
9. BLUE PRINT READING
Scales and dimensions, graphical symbols specification, material estimation, isometric drainage systems
10. BASIC ELECTRICITY
Volt augers, watts, kilowatt required to heat water, effective use of immersion heaters, thermostatic controls, derangement time and pressure suitable
11. BASIC BUILDING CONSTRUCTION
Execution of trenches, safety requirement.
Setting out, disposal of surface water
Types of foundation
Damp proof courses
12. CRAFT PRACTICE
Safe use of material and process.
Site and workshop hygiene, slain protection and care
Measuring, marking and setting out pipe work
Allowances of threads, fittings and joints
Use and care of tools and equipment
Cutting, threading and jointing steel pipes
Bending of pipes by means of heat and by machines.
Making connection to appliance and equipment
Fittings, tape and valves.
13. SCIENCE AND CALCULATION
Principle of levers inclined planes, jacks and pulleys, stability of scaffolding.
Introduction of electricity of electrical units
Combustion of fuels
Dauber from products of combustion
Units of force, pressure and work done
Simple cost calculation
Linear expansion of metals and plastics.
Deterioration, oxidation and corrosion of metals.
After the period of 3 years successful attendance and passing the examination a candidate is awarded the intermediate Plumbing Certificate; Now called Certificate II. Having obtained the intermediate Plumbing certificate one can proceed to pursue Advanced Plumbing after satisfying the following requirements;
- Certificate II with one- or two-years industrial experience
- Construction Technician I Certificate.